CalenGoo now uses a newer icon. If you don’t like it you can still switch back to the old icon. Additionally it is now possible to be informed about new or changed events in directly synced calendars. Using push synchronisation you can be informed about changes in shared calendars within a minute. This way you can stay up-to-date and see which events were added to your calendars. The changes are displayed as status bar notifications. You can configure it under "Settings > Visibility/Download > blue button > Report changes as status bar notifications".